import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    a = [int(input()) for _ in range(26)]
    a11 = a[11]
    if a11 > 2:
        pl = max(n * (n - 1) * (a11 - n) // 2 for n in range(1, a11))
    else:
        pl = 0
    a14 = a[14]
    po = (a14 // 2) * (a14 - a14 // 2)
    ans = a[3] * a[4] * a[7] * a[17] * a[22] * pl * po
    print(ans)

main()